I can't remember if the optisparks are interchangeable. Found out it is the 95 opti that has the vents. You can read up on it here: https://www.corvetteforum.com/forum...ition-control-module-1993-vs-1995-a.html
Should be ok with the stock rearend, unless you are hard on it. Slicks on sticky dragstrip might be bad for it.
Dunno about the trans cable.
AC shouldnt be too hard, possibly need some custom hoses.
Wiring: I had the factory LT1 harness reworked to remove what I didnt need, then it was basically standalone harness. It had wires for the check engine light, & tach.The rest use the stock Monte sending units (temp, oil pressure)